US Bridges

County Road 116 over Armells Creek 115

Fair

Fergus County, Montana · 10M NE Hilger · Structure no. L14116000+06001

Built
1977
48 years old, rebuilt 2021
Condition
Fair
inspected December 2023
Type
Stringer/Multi-beam or Girder
Wood or Timber
Length
45 ft
3 main spans
Daily traffic
100
2025 count
Owner
County
County Highway Agency

About this bridge

County Road 116 over Armells Creek 115 is a wood or timber stringer/multi-beam or girder carrying County Road 116 over Armells Creek 115 in Fergus County, Montana. It was built in 1977 and reconstructed in 2021, so it is 48 years old, older than the Montana average of 47 years.

The most recent inspection reported to the Federal Highway Administration rates it in fair condition with a lowest component rating of 6 out of 9. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

It carries about 100 vehicles a day, roughly 3% of them trucks, projected to reach 100 by 2040. The structure is 45 ft (13.7 m) long and 20 ft wide. If it were closed, the detour would be 8.7 mi (14 km).

Location

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CarriesCounty Road 116
CrossesArmells Creek 115
Location10M NE Hilger
RouteCounty Highway 14116
CountyFergus County
StateMontana
Coordinates47.31541, -109.18286
Functional classRural Local

Condition and inspection

Fair

The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound.

ComponentRatingMeaning
Deck7 GoodSome minor problems.
Superstructure6 SatisfactoryStructural elements show some minor deterioration.
Substructure6 SatisfactoryStructural elements show some minor deterioration.
Channel and channel protection6 SatisfactoryStructural elements show some minor deterioration.
Last inspectionDecember 2023
Inspection intervalevery 24 months
Operating statusOpen, no restriction
ScourScour critical; foundations unstable for calculated scour conditions
Structural evaluation6: Equal to present minimum criteria
Deck geometry5: Somewhat better than minimum adequacy to tolerate being left in place as is
Waterway adequacy7: Better than present minimum criteria
Approach roadway alignment6: Equal to present minimum criteria
Operating rating30 US tons
Inventory rating23 US tons

Structure

Structure typeStringer/Multi-beam or Girder
MaterialWood or Timber
DeckWood or timber
Main spans3
Design loadUnknown
Structure length45 ft (13.7 m)
Longest span13 ft (4 m)
Deck width20 ft (6.1 m)
Roadway width20 ft (6.1 m)
Vertical clearance over deckUnrestricted

Traffic and service

Average daily traffic100 (2025)
Projected traffic100 by 2040
Trucks3%
Lanes on structure2
Traffic directionTwo-way traffic
CarriesHighway
CrossesWaterway
Detour if closed8.7 mi (14 km)
TollOn a free road
National Highway SystemNo

Ownership and planned work

OwnerCounty Highway Agency
Maintained byCounty Highway Agency
Historic statusNot eligible for the National Register of Historic Places
Work proposedNone recorded
Estimated improvement cost—
NavigationNo navigation control on waterway

Frequently asked questions

When was County Road 116 over Armells Creek 115 built?

It was built in 1977, making it 48 years old in 2025. It was reconstructed in 2021.

What condition is County Road 116 over Armells Creek 115 in?

The National Bridge Inventory rates it in fair condition. The lowest-rated primary component is rated 5 or 6. Minor deterioration is present but the structure is sound. The last reported inspection was in December 2023.

How much traffic does County Road 116 over Armells Creek 115 carry?

About 100 vehicles per day (2025 count), of which roughly 3% are trucks.

How long is County Road 116 over Armells Creek 115?

The structure is 45 ft (13.7 m) long with a longest span of 13 ft (4 m) and a deck 20 ft wide.

Who owns County Road 116 over Armells Creek 115?

It is owned by the County Highway Agency.